%0 Journal Article %1 Cotton.1980d %A Cotton, F. Albert %A Ilsley, William H. %A Kaim, Wolfgang. %D 1980 %J Inorganic Chemistry %K amidinato binuclear complex rhenium structure %N 8 %P 2360--2364 %R 10.1021/ic50210a037 %T Some reactions of the octahalodirhenate(III) ions. 11. Two new quadrupoly bonded dirhenium amidinato-bridged complexes %V 19 %X The prepn., mass spectra, and structures of Re2(PhN)2CMe2Cl4 (I) and Re2(MeN)2CPh4Cl2.CCl4 (II) are reported. I crystallizes in the monoclinic space group P21/n with a 14.774(4), b 12.008(4), c 16.990(5) \AA, b 92.78°, V = 3002(3) \AA3, and Z = 4. The mols. occupy general positions within the cell and have a rotational conformation that is twisted -3.8° from the perfectly eclipsed conformation. The Re-Re bond length is 2.178(1) \AA, and the Re-Cl and Re-N distances are 2.314(7) (av.) and 2.06(2) \AA (av.), resp. II crystallizes in the tetragonal space group I4/mmm with a 14.235(2), c 12.199(2) \AA, V = 2472(1) \AA3, and Z = 4. The Re-Re and Re-Cl bond lengths are 2.208(2) and 2.654(6) \AA, resp. The structure of I is very similar to that previously found for Re2(PhN)2CPh2Cl4, as would be expected. II is of interest because the Me groups keep the axial Cl- ligands at a greater distance than for the Re2(O2CR)4Cl2 compds. (R = Ph, CMe3) which have Re-Cl $\approx$ 2.48 \AA. The Re-Re distance in II is significantly shorter (by 0.022 \AA) than in the carboxylato compds., thus showing again the effect of axial ligands in weakening M-M quadrupole bonds as well as the ability of the N and N' substituents in amidinato, triazinato, and amidato ligands to restrict access to the axial positions. on SciFinder(R)

@article{Cotton.1980d, abstract = {The prepn., mass spectra, and structures of Re2[(PhN)2CMe]2Cl4 (I) and Re2[(MeN)2CPh]4Cl2.CCl4 (II) are reported. I crystallizes in the monoclinic space group P21/n with a 14.774(4), b 12.008(4), c 16.990(5) {\AA}, \textgreek{b} 92.78°, V = 3002(3) {\AA}3, and Z = 4. The mols. occupy general positions within the cell and have a rotational conformation that is twisted -3.8° from the perfectly eclipsed conformation. The Re-Re bond length is 2.178(1) {\AA}, and the Re-Cl and Re-N distances are 2.314(7) (av.) and 2.06(2) {\AA} (av.), resp. II crystallizes in the tetragonal space group I4/mmm with a 14.235(2), c 12.199(2) {\AA}, V = 2472(1) {\AA}3, and Z = 4. The Re-Re and Re-Cl bond lengths are 2.208(2) and 2.654(6) {\AA}, resp. The structure of I is very similar to that previously found for Re2[(PhN)2CPh]2Cl4, as would be expected. II is of interest because the Me groups keep the axial Cl- ligands at a greater distance than for the Re2(O2CR)4Cl2 compds. (R = Ph, CMe3) which have Re-Cl $\approx$ 2.48 {\AA}. The Re-Re distance in II is significantly shorter (by 0.022 {\AA}) than in the carboxylato compds., thus showing again the effect of axial ligands in weakening M-M quadrupole bonds as well as the ability of the N and N' substituents in amidinato, triazinato, and amidato ligands to restrict access to the axial positions. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Cotton, F. Albert and Ilsley, William H. and Kaim, Wolfgang.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/23ba5d0552890cdc4b9ca1d1d00a5e767/huebleriac}, doi = {10.1021/ic50210a037}, interhash = {33e097a098eefaae415f12faa573515d}, intrahash = {3ba5d0552890cdc4b9ca1d1d00a5e767}, issn = {0020-1669}, journal = {Inorganic Chemistry}, keywords = {amidinato binuclear complex rhenium structure}, number = 8, pages = {2360--2364}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Some reactions of the octahalodirhenate(III) ions. 11. Two new quadrupoly bonded dirhenium amidinato-bridged complexes}, volume = 19, year = 1980 }